JP6931962B2 - Automotive antenna device - Google Patents

Description

The present invention relates to an in-vehicle antenna device.

Conventionally, as in Patent Document 1, an in-vehicle antenna device that holds a capacitive loading element on the outer surface of an inner case has been proposed.

JP-A-2015-154104

However, there is a risk that the capacitive loading element will be deformed during the assembly work of the in-vehicle antenna device.

Therefore, an object of the present invention is to provide an in-vehicle antenna device in which the capacitive loading element is not easily deformed during assembly work.

The vehicle-mounted antenna device according to the present invention includes an inner case and a capacitive loading element held on the outer surface of the inner case, and the end portion of the capacitive loading element is held in a state where the capacitive loading element is held by the inner case. Is held inward with respect to the outer surface of the inner case.

Therefore, it becomes difficult for the end face of the end portion to be touched from the outside. Thereby, for example, it is possible to prevent the operator from touching the end face and deforming the capacitive loading element during the assembly work of the in-vehicle antenna device.

Preferably, the inner case has an inwardly recessed hole, the end of the capacitive loading element is bent inward and inserted into the hole to hold it inward with respect to the outer surface of the inner case. NS.

By inserting the end portion into the hole portion, it becomes difficult for the end face of the end portion to be touched from the outside. Thereby, for example, it is possible to prevent the operator from touching the end face and deforming the capacitive loading element during the assembly work of the in-vehicle antenna device.

Further, preferably, the inner case has a wall portion protruding outward and a protrusion, a hole is provided at the end portion of the capacitive loading element, and the end portion has a protrusion in a region surrounded by the wall portion. By being inserted into the hole, it is held inside with respect to the outer surface of the inner case.

By providing the wall portion and inserting the protrusion into the hole, it becomes difficult for the end face of the edge of the capacitive loading element to be touched from the outside. Thereby, for example, it is possible to prevent the operator from touching the end face and deforming the capacitive loading element during the assembly work of the in-vehicle antenna device.

More preferably, the capacitive loading element has a protrusion that projects in the front-rear direction, and when the capacitive loading element is attached to the inner case, the protrusion is deformed and held by the wall portion.

The reaction force of the protrusion that tries to return from the deformed state to the state before the deformation makes it difficult for the capacitive loading element to come off from the inner case.

Further, preferably, the end portion of the capacitive loading element includes a lower end portion and an upper end portion, and the inner case does not cover the lower end portion of the capacitive loading element. Cover at least part of the upper edge.

By covering at least a part of the upper end portion with the inner case, it becomes difficult for the end face of at least a part of the upper end portion of the capacitive loading element to be touched from the outside. Thereby, for example, it is possible to prevent the operator from touching the end face and deforming the capacitive loading element during the assembly work of the in-vehicle antenna device.

The vehicle-mounted antenna device according to the present invention includes an inner case, a capacitive loading element held on the outer surface of the inner case, and a cover that covers a part of a region of the capacitive loading element held by the inner case from above. The cover covers the upper end of the capacitive loading element from above.

Since the upper end is covered by the cover, the end face of the upper end of the capacitive loading element is hidden by the cover.
Therefore, after the upper end portion of the capacitive loading element is covered with the cover, the end surface of the upper end portion becomes difficult to touch from the outside. Thereby, for example, it is possible to prevent the capacitive loading element from being deformed by touching the end face during the assembly work of the in-vehicle antenna device.

Preferably, the end of the capacitive loading element includes a lower end and an upper end, and the cover does not cover the lower end of the capacitive loading element and the upper end of the capacitive loading element. Cover at least part of the part.

As described above, according to the present invention, it is possible to provide an in-vehicle antenna device in which the capacitive loading element is not easily deformed during assembly work.

It is a perspective view of the vehicle-mounted antenna device excluding the outer case in the first embodiment. It is a perspective view which shows the state before each part of the vehicle-mounted antenna device except the outer case in 1st Embodiment is assembled. It is a perspective view which shows the state before assembling the inner case and the capacitive loading element in 1st Embodiment. It is a perspective view of the inner case which attached the capacitive loading element in 2nd Embodiment. It is an enlarged perspective view of the rear upper part of FIG. It is a perspective view of the inner case to which the capacitive loading element is attached in the modification 1 of the 2nd Embodiment, and is the enlarged view of the rear upper part. FIG. 5 is a cross-sectional configuration diagram showing a rear upper portion in a state before the inner case and the capacitive loading element are assembled in the second modification of the second embodiment. It is sectional drawing which shows the part above the rear part of the inner case which attached the capacitive loading element in the modification 2 of 2nd Embodiment. It is a perspective view of the capacitive loading element in the modification 2 of the 2nd Embodiment. It is a perspective view of the inner case which attached the capacitive loading element and the cover in 3rd Embodiment. It is a perspective view which shows the state before assembling the inner case, the capacitive loading element and the cover in 3rd Embodiment. It is a perspective view which shows the state before the inner case, the capacitive loading element and the cover are assembled in the modification 1 of the 3rd Embodiment. It is a perspective view which shows the state before the inner case, the capacitive loading element and the cover are assembled in the modification 2 of the 3rd Embodiment. It is a perspective view which shows the state before assembling the inner case and the capacitive loading element in 4th Embodiment. It is a perspective view of the inner case which attached the capacitive loading element in 4th Embodiment. FIG. 5 is a cross-sectional configuration diagram showing a state above the rear portion of the inner case to which the capacitive loading element is attached according to the fourth embodiment, before the second protruding piece of the capacitive loading element is bent. FIG. 5 is a cross-sectional configuration diagram showing a state after the second protruding piece of the capacitive loading element is bent, which is a portion above the rear portion of the inner case to which the capacitive loading element is attached according to the fourth embodiment.

Hereinafter, the first embodiment will be described with reference to the drawings.
The embodiment is not limited to the following embodiments. In principle, the contents described in one embodiment are similarly applied to other embodiments. In addition, each embodiment and each modification can be combined as appropriate.

(First Embodiment)
The in-vehicle antenna device 1 according to the first embodiment is attached to the upper surface of a vehicle such as a roof.
For example, as shown in FIGS. 1 and 2, the in-vehicle antenna device 1 includes an antenna case (outer case (not shown), first inner case 2A), first capacitive loading element 3A, and internal antenna element portion (first antenna). It includes an element 5a, a second antenna element 5b), a substrate (first substrate 6a, second substrate 6b), a pad 7, a metal base 8, and a sealing member 9.

The first inner case 2A is an example of an inner case, and the first capacitive loading element 3A is an example of a capacitive loading element.

In order to explain the directions, the front-rear direction of the vehicle to which the in-vehicle antenna device 1 is mounted is defined as the x direction, the left-right direction perpendicular to the x direction is defined as the y direction, and the substantially vertical direction perpendicular to the x direction and the y direction is defined as the z direction. do.
In FIG. 1, the directions indicated by the arrows on the xyz axis are defined as the forward direction, the right direction, and the upward direction, respectively.

The outer case is made of a synthetic resin having radio wave transmission, and has, for example, a shark fin shape in which the front side in the x direction is inclined so as to be lower than the rear side in the x direction, and both side surfaces are curved inward.

The lower surface of the outer case is open to cover the first inner case 2A and the like.
For example, the first inner case 2A and the first capacitance loading element 3A are housed in the space formed by the outer case and the metal base 8.

It should be noted that a part of the roof of the vehicle may be raised upward in the z direction to form an outer case.

The first inner case 2A is made of a synthetic resin having radio wave transmission and has an open lower surface, and is a member constituting the in-vehicle antenna device 1.
The first inner case 2A covers the first substrate 6a and the like.
For example, an antenna element portion (first antenna element 5a, second antenna element 5b) is housed in the space formed by the first inner case 2A and the first substrate 6a.

The first capacitive loading element 3A is attached to the outer surface of the first inner case 2A by screwing through the first screw hole 211 and the through hole 311.
The first capacitive loading element 3A and the second substrate 6b are electrically connected via the screwing screw.

The first capacitive loading element 3A is, for example, an AM / FM capacitive loading element, and is formed by processing a conductor plate such as a tin-plated steel plate or a stainless steel plate.
As shown in FIG. 3, the first capacitive loading element 3A is composed of two elements attached to the right side portion and the left side portion of the first inner case 2A when viewed from the rear in the x direction.
The two elements constituting the first capacitive loading element 3A are attached to the outer surface of the first inner case 2A.
The details of the configuration in which the first capacitance loading element 3A is attached to the outer surface of the first inner case 2A will be described later.

Each of the two elements has a substantially trapezoidal (or substantially triangular) outer shape as a whole when viewed from the y direction, and is configured in a meander shape. For example, each element is formed so that one metal plate has a meandering shape by press working. Further, for example, when it is assumed that a metal plate is cut to form a meander shape, the portion cut from the metal plate is referred to as a cut portion.

The first antenna element 5a includes a planar antenna for receiving satellite broadcasting and is attached to the first substrate 6a.
The second antenna element 5b includes a planar antenna for receiving position information (time information) from a satellite such as GPS, and is attached to the first substrate 6a behind the first antenna element 5a in the x direction.
However, the number of antenna elements provided between the first inner case 2A and the first substrate 6a and the type of signal received by the antenna elements are not limited to this.

The first substrate 6a and the second substrate 6b mount electronic components related to the antenna element, such as an antenna amplifier that amplifies the received signal of the first capacitive loading element 3A.
The first substrate 6a is attached to the upper part of the metal base 8 by screwing.
The second substrate 6b is attached so as to stand upright on the first substrate 6a.

The pad 7 is an annular elastic member made of elastomer, rubber, or the like.
The pad 7 is sandwiched between the lower end peripheral portion of the first inner case 2A and the metal base 8.
By such sandwiching, the pad 7 blinds the gap between the lower end peripheral portion of the first inner case 2A and the metal base 8 and prevents water from entering the first inner case 2A.

The metal base 8 is a metal body that holds the first substrate 6a.

On the lower surface of the metal base 8, a sealing member 9 which is an annular elastic member made of elastomer, rubber, urethane foam, or the like is provided.
The sealing member 9 watertightly seals the periphery of the area between the metal base 8 and the roof of the vehicle (or the inner panel under the roof) where the mounting holes are provided.

An antenna-side connector (not shown) is attached to the lower surface of the metal base 8.
The antenna-side connector is electrically connected to the first substrate 6a.
The antenna-side connector is connected to the vehicle-side connector.

A resin base for holding the metal base 8 may be further provided.
In this case, the resin base sandwiches the pad 7 with the first inner case 2A.

Next, a configuration in which the first capacitive loading element 3A according to the first embodiment is attached to the outer surface of the first inner case 2A will be described.

The first capacitive loading element 3A has an upper end 31a and a lower end 31b. The upper end portion 31a of the first capacitive loading element 3A is provided at the upper end of the first capacitive loading element 3A, and is formed by being bent so as to be inward of the first inner case 2A. The upper end portion 31a can be inserted into the upper hole portion 21a described later.
The lower end 31b of the first capacitive loading element 3A is provided at the lower end of the first capacitive loading element 3A. The lower end 31b of the first capacitive loading element 3A is provided with a first lower protruding piece 31b1 that projects toward the side of the outer surface of the first inner case 2A. The lower end portion 31b can be inserted into a pilot hole portion 21b described later.

In the region where the upper end portion 31a of the first inner case 2A is inserted, an upper hole portion 21a recessed inward from the other region of the first inner case 2A is provided.
In the region where the first lower protruding piece 31b1 of the lower end 31b of the first inner case 2A is inserted, a pilot hole portion 21b recessed inward from the other regions of the first inner case 2A is provided.
A first screw hole 211 for screwing is provided in a region of the outer surface of the first inner case 2A that faces the through hole 311 of the first capacitive loading element 3A.

The upper end 31a is inserted into the upper hole 21a, and the first lower protruding piece 31b1 of the lower end 31b is inserted into the pilot hole 21b. That is, the upper end portion 31a of the first capacitance loading element 3A is held inside with respect to the outer surface of the inner case 2A. As a result, the first capacitance loading element 3A is temporarily fixed to the outer surface of the first inner case 2A.
After temporary fixing, screws are inserted into the through holes 311 and the first screw holes 211, and the first capacitance loading element 3A is fixed to the first inner case 2A by screwing.

If the end surface of the upper end 31a of the first capacitive loading element 3A is touched from the outside, the first capacitive loading element 3A may be deformed.

Since the upper end portion 31a is inserted into the upper hole portion 21a, the end surface of the upper end portion 31a of the first capacitive loading element 3A is hidden in the upper hole portion 21a.
By inserting the upper end portion 31a into the upper hole portion 21a, the end portion (at least the upper end portion) of the first capacitance loading element 3A is held in the state where the first capacitance loading element 3A is held by the first inner case 2A. 31a) is held inside the first inner case 2A with respect to the outer surface.
Therefore, after the first capacitive loading element 3A is attached to the first inner case 2A, the end face of the upper end portion 31a becomes difficult to touch from the outside, and the end face is touched during the assembly work of the in-vehicle antenna device 1. , It is possible to prevent the first capacitance loading element 3A from being deformed.

Further, since the upper end portion 31a of the first capacitance loading element 3A is inserted into the upper hole portion 21a of the side portion of the first inner case 2A, the upper end portion 31a of the first capacitance loading element 3A is, for example, z. There is no need to fix it with screws from above.
Therefore, the number of screws used can be reduced as compared with the form in which the upper end 31a of the first capacitance loading element 3A is fixed to the first inner case 2A by screwing.

As a result of reducing the number of screws used, the cost can be reduced. Further, as a result of reducing the number of screws to be used, it is possible to reduce the influence on the electrical performance of the first capacitive loading element 3A when the screws come into contact with the first capacitive loading element 3A.

Although it has been described that the upper end portion 31a is inserted into the upper hole portion 21a, a part of the region of the upper end portion 31a may be inserted into the upper hole portion 21a.

(Modification 1 of the first embodiment)
The upper end portion 31a is inserted into the upper hole portion 21a, the first lower protruding piece 31b1 of the lower end portion 31b is inserted into the prepared hole portion 21b, and the first capacitance loading element 3A is inserted into the first inner case 2A. When fixing to, an adhesive such as an anaerobic adhesive or a UV curable adhesive may be used to bond the first capacitance loading element 3A and the first inner case 2A.
As a result, the first capacitance loading element 3A can be more firmly fixed to the first inner case 2A.

(Modification 2 of the first embodiment)
Further, the upper end portion 31a is inserted into the upper hole portion 21a, the first lower protruding piece 31b1 of the lower end portion 31b is inserted into the prepared hole portion 21b, and the first capacitance loading element 3A is inserted into the first inner case 2A. When fixing to, the first capacitance loading element 3A and the first inner case 2A may be welded by heat welding, ultrasonic welding, or the like.
As a result, the first capacitance loading element 3A can be more firmly fixed to the first inner case 2A.

(Modification 3 of the first embodiment)
Further, after inserting the upper end portion 31a into the upper hole portion 21a and inserting the first lower protruding piece 31b1 of the lower end portion 31b into the prepared hole portion 21b, the entire first capacitance loading element 3A is inserted from the outside. The first capacitive loading element 3A may be fixed to the first inner case 2A by covering with a shrinkable film (not shown).
As a result, the first capacitance loading element 3A can be more firmly fixed to the first inner case 2A.

(Modification 4 of the first embodiment)
Further, after inserting the upper end portion 31a into the upper hole portion 21a and inserting the first lower protruding piece 31b1 of the lower end portion 31b into the prepared hole portion 21b, the tape is attached to the first capacitance loading element 3A from the outside. The first capacitance loading element 3A may be fixed to the first inner case 2A by being attached to the first inner case 2A.
Further, the upper end portion 31a is inserted into the upper hole portion 21a, the first lower protruding piece 31b1 of the lower end portion 31b is inserted into the prepared hole portion 21b, and the first capacitance loading element 3A is inserted into the first inner case 2A. When fixing to, the double-sided tape may be attached between the first capacitance loading element 3A and the first inner case 2A.
As a result, the first capacitance loading element 3A can be more firmly fixed to the first inner case 2A.

(Modification 5 of the first embodiment)
Further, the first capacitance loading element 3A may be fixed to the first inner case 2A by insert molding.
Specifically, after the first capacitance loading element 3A is placed in the mold of the first inner case 2A, the resin constituting the first inner case 2A is poured into the mold to form the first inner case 2A. Will be done.
As a result, the first capacitance loading element 3A can be more firmly fixed to the first inner case 2A.

(Second Embodiment)
In the first embodiment, the upper end portion 31a of the first capacitive loading element 3A is inserted into the upper hole portion 21a of the first inner case 2A, whereby the upper end portion 31a of the first capacitive loading element 3A is inserted. The form that makes it difficult to touch from the outside was explained.
However, the form that makes it difficult for the upper end portion 31a to be touched from the outside is not limited to this.

For example, as shown in FIGS. 4 and 5, the second inner case is held so that the end surface of the upper end 31a of the second capacitive loading element 3B is held inside with respect to the outer surface of the second inner case 2B. It is conceivable that the wall portion 22 and the protrusion 23 are provided on the 2B, and the first hole 32 into which the protrusion 23 can be inserted is provided on the second capacitance loading element 3B.

Specifically, the upper end 31a of the second capacitive loading element 3B in the second embodiment is provided with a first hole 32 for hooking.
The lower end 31b of the second capacitive loading element 3B is provided with a second lower protruding piece 31b2 that projects downward in the z direction.

Further, the second inner case 2B in the second embodiment has end faces of edges (upper end 31a, lower end 31b, front end, rear end) of the second capacitive loading element 3B. A wall portion 22 that is perpendicular to the outer surface and projects outward with respect to the outer surface is provided in the region facing the outer surface.
When the second capacitance loading element 3B is attached to the second inner case 2B, the positional relationship is such that the end portion of the second capacitance loading element 3B does not protrude in the height direction from the tip of the wall portion 22. The height of the wall portion 22 is determined.
Therefore, the region on the outer surface of the second inner case 2B to which the second capacitance loading element 3B is attached has a concave shape as compared with the wall portion 22 around the region.
The second capacitive loading element 3B is held in a region surrounded by the wall portion 22 on the outer surface of the second inner case 2B.

The second inner case 2B is an example of an inner case, and the second capacitive loading element 3B is an example of a capacitive loading element.

In the region where the second lower protruding piece 31b2 of the lower end portion 31b of the second inner case 2B is inserted, a pilot hole portion 21b recessed downward in the z direction with respect to the other region is provided.

Further, in the region of the second inner case 2B facing the first hole 32 of the second capacitance loading element 3B, a protrusion 23 that projects outward (for example, upward in the z direction) and can be inserted into the first hole 32 is provided. Be done.

The protrusion 23 of the second inner case 2B is inserted into the first hole 32 of the second capacitance loading element 3B, and the second lower protruding piece 31b2 of the lower end 31b is inserted into the pilot hole 21b from the z direction. As described above, the second capacitance loading element 3B is attached to the recessed region on the outer surface of the second inner case 2B. As a result, the second capacitance loading element 3B is temporarily fixed to the outer surface of the second inner case 2B.
After temporary fixing, screws are inserted into the through holes 311 and the first screw holes 211, and the second capacitance loading element 3B is fixed to the second inner case 2B by screwing.

In the region of the second inner case 2B facing the end face of the edge of the second capacitive loading element 3B (upper end 31a, lower end 31b, front end, rear end), a second A wall portion 22 that projects outward from the capacitive loading element 3B is provided.
Further, the first hole 32 of the second capacitance loading element 3B is hooked on the protrusion 23 of the second inner case 2B.
An end portion (at least) of the second capacitance loading element 3B is provided in a state where the wall portion 22 is provided and the protrusion 23 is inserted into the first hole 32 so that the second capacitance loading element 3B is held by the second inner case 2B. The upper end 31a) is held inward with respect to the outer surface (at least the tip of the wall 22) of the second inner case 2B.
Therefore, after the second capacitance loading element 3B is attached to the second inner case 2B, the end surface of the edge of the second capacitance loading element 3B is less likely to be touched from the outside. Thereby, for example, it is possible to prevent the operator from touching the end face and deforming the second capacitance loading element 3B during the assembly work of the in-vehicle antenna device 1.

Further, since the first hole 32 of the second capacitance loading element 3B is hooked on the protrusion 23 of the second inner case 2B, the upper end 31a of the second capacitance loading element 3B is screwed from above in the z direction. There is no need to fix it.
Therefore, the number of screws used can be reduced as compared with the form in which the upper end 31a of the second capacitance loading element 3B is fixed to the second inner case 2B by screwing.

If the number of screws used can be reduced, the cost can be reduced. Further, as a result of reducing the number of screws to be used, it is possible to reduce the influence on the electrical performance of the second capacitance loading element 3B when the screws come into contact with the second capacitance loading element 3B.

The wall portion 22 may be provided not only around the recessed region to which the second capacitance loading element 3B is attached, but also inside the recessed region.
In the second embodiment, the wall portion 22 is provided not only around the recessed region but also in the region of the second capacitive loading element 3B facing the meander-shaped excised portion.
This facilitates the alignment of the second capacitance loading element 3B with respect to the second inner case 2B.

(Modification 1 of the second embodiment)
As shown in FIG. 6, the upper end 31a of the second capacitive loading element 3B may be further provided with protrusions 33 projecting forward in the x direction and rearward in the x direction.
When the second capacitance loading element 3B is attached to the outer surface of the second inner case 2B, the protrusion 33 hits the wall portion 22 of the second inner case 2B and is deformed.
Specifically, the tip of the protrusion 33 is bent upward in the z direction in a state of being in contact with the wall 22.
The reaction force of the protrusion 33 that tries to return from the bent state to the state before the bending makes it difficult for the second capacitance loading element 3B to come off from the second inner case 2B.

(Modification 2 of the second embodiment)
As shown in FIGS. 7A, 7B, and 7C, a part of the upper end portion 31a of the second capacitance loading element 3B is further provided with the second capacitance loading element 3B so as to be difficult to come off from the second inner case 2B. The removal prevention piece 34 may be provided.
In FIG. 7C, the cut portion of the metal plate forming the mianda is omitted.

The pull-out prevention piece 34 is a cutout piece having a substantially rectangular shape, and is formed by cutting out a part of the upper end portion 31a in a substantially U-shape (or a substantially L-shape) when viewed from above in the z direction. NS.
The pull-out prevention piece 34 is connected to the upper end portion 31a at the tip (root portion 34a) on the side close to the end face of the upper end portion 31a of the pull-out prevention piece 34.
The tip 34b on the side of the slip-out prevention piece 34 on the side away from the end surface of the upper end 31a is separated from the upper end 31a through the notch having a substantially U-shape (or a substantially L-shape).

The region of the slip-out prevention piece 34 including the tip 34b on the side away from the end face of the upper end 31a is bent so as to be higher in the z direction than, for example, the root portion 34a. The region of the slip-out prevention piece 34 including the tip 34b on the side away from the end surface of the upper end 31a may be bent so as to be lower in the z direction than the root portion 34a, for example.
The location where the pull-out prevention piece 34 is provided includes an end region in the front in the x direction and an end region in the rear in the x direction in the upper end 31a of the second capacitive loading element 3B (for example, in the second embodiment modification 1). The same location as the region where the indicated protrusion 33 is provided) is conceivable. The location where the pull-out prevention piece 34 is provided can be arbitrarily changed.

In this case, a pull-out prevention hole 24 extending in the y direction is provided in the region where the pull-out prevention piece 34 is inserted in the second inner case 2B.
When the second capacitance loading element 3B is attached to the second inner case 2B, the pull-out prevention piece 34 is inserted into the pull-out prevention hole 24 in the direction indicated by the dotted arrow in FIG. 7A.
At this time, the tip of the pull-out prevention piece 34 bent upward in the z direction is caught in the pull-out prevention hole 24. Therefore, after the pull-out prevention piece 34 is inserted into the pull-out prevention hole 24, the second capacitance loading element 3B is less likely to come off from the second inner case 2B.

Further, by inserting the region including the disconnection prevention piece 34 in the upper end 31a of the second capacitance loading element 3B into the disconnection prevention hole 24, the second inner case 2B is placed on the lower side of the second capacitance loading element 3B. Does not cover the end portion 31b of the upper end portion 31a, but covers the region including the pull-out prevention piece 34 of the upper end portion 31a.
Therefore, after the second capacitance loading element 3B is attached to the second inner case 2B, at least a part of the end surface of the upper end 31a of the second capacitance loading element 3B is less likely to be touched from the outside. Thereby, for example, it is possible to prevent the operator from touching the end face and deforming the second capacitance loading element 3B during the assembly work of the in-vehicle antenna device 1.

Deformation Example 1 (adhesion), Deformation Example 2 (welding), Deformation Example 3 (covering with a film), Deformation Example 4 (pasting with tape), Deformation Example 5 (in-molding) of the first embodiment Molding) can also be applied to the second embodiment.

(Third Embodiment)
In the first embodiment, the upper end portion 31a of the first capacitive loading element 3A is inserted into the upper hole portion 21a of the first inner case 2A, whereby the upper end portion 31a of the first capacitive loading element 3A is inserted. The form that makes it difficult to touch from the outside was explained.
However, the form that makes it difficult for the upper end portion 31a to be touched from the outside is not limited to this.

For example, as shown in FIGS. 8 and 9, a part of the upper end 31a of the third capacitive loading element 3C (for example, the end of the upper end 31a in the front in the x direction and the end in the rear in the x direction). ), A first upper protruding piece 31a1 extending downward from the tip in the z direction is provided, and the upper end 31a is covered with the cover 4.

Specifically, the upper end portion 31a of the third capacitive loading element 3C is bent inward with respect to the outer surface of the third inner case 2C, and the first upper portion protrudes to a part of the tip portion thereof. Pieces 31a1 are provided.
The lower end 31b of the third capacitive loading element 3C is provided with a second lower protruding piece 31b2 that projects downward in the z direction.

An engaging hole 25 extending downward in the z direction is provided in a region of the ridge portion of the third inner case 2C in the third embodiment and facing the first upper protruding piece 31a1.
Further, a second screw hole 212 is provided in the ridge portion of the third inner case 2C and in the area where the cover 4 is screwed.

The third inner case 2C is an example of an inner case, and the third capacitive loading element 3C is an example of a capacitive loading element.

Further, in the region of the third inner case 2C covered by the upper end 31a of the third capacitance loading element 3C, a cover 4 covering a part of the third inner case 2C and the third capacitance loading element 3C is provided.
The cover 4 extends in the x direction and has a shape that follows the shape of the ridge portion of the third inner case 2C.

The cover 4 is provided with a screw hole (third screw hole 412) for screwing with the third inner case 2C.
The cover 4 is attached to the third inner case 2C by screwing through the second screw hole 212 and the third screw hole 412. Here, the positional relationship when the cover 4 is attached to the third inner case 2C is the positional relationship in which the upper end 31a of the third capacitance loading element 3C is sandwiched between the cover 4 and the third inner case 2C in the z direction. There is a positional relationship in which the third capacitance loading element 3C and the screw do not come into contact with each other.
The screw for screwing the cover 4 to the third inner case 2C may be made of metal or resin.

The first upper protruding piece 31a1 of the upper end 31a of the third capacitive loading element 3C is inserted into the engaging hole 25 from the z direction, and the second lower protruding piece 31b2 of the lower end 31b is a pilot hole from the z direction. The third capacitive loading element 3C is attached to a recessed region on the outer surface of the third inner case 2C so as to be inserted into the portion 21b. As a result, the third capacitance loading element 3C is temporarily fixed to the outer surface of the third inner case 2C.
After temporary fixing, screws are inserted into the through holes 311 and the first screw holes 211, and the third capacitance loading element 3C is fixed to the third inner case 2C by screwing.
Further, screws are inserted into the third screw hole 412 and the second screw hole 212, and the cover 4 is attached to the third inner case 2C by screwing.

The cover 4 does not cover the lower portion (at least the region including the lower end 31b) of the third capacitance loading element 3C, and the upper portion (at least the upper end 31a) of the third capacitance loading element 3C. Covers the area including the end face of. As a result, for example, the operator cannot see the upper end 31a of the third capacitive loading element 3C from the outside (upper side).

Since the upper end portion 31a is covered by the cover 4, the end surface of the upper end portion 31a of the third capacitive loading element 3C is hidden by the cover 4.
Therefore, after the upper end 31a of the third capacitive loading element 3C is covered with the cover 4, the end face of the upper end 31a is less likely to be touched from the outside. Thereby, for example, it is possible to prevent the operator from touching the end face and deforming the third capacitance loading element 3C during the assembly work of the in-vehicle antenna device 1.

Further, since the upper end 31a of the third capacitance loading element 3C is sandwiched between the cover 4 and the third inner case 2C in the z direction, the upper end 31a of the third capacitance loading element 3C is screwed from above in the z direction. There is no need to fix it with a stopper.
Therefore, the number of screws used can be reduced as compared with the form in which the upper end 31a of the third capacitance loading element 3C is fixed to the third inner case 2C by screwing.

If the number of screws used can be reduced, the cost can be reduced. Further, as a result of reducing the number of screws to be used, it is possible to reduce the influence on the electrical performance of the third capacitance loading element 3C when the screws come into contact with the third capacitance loading element 3C.

(Modification 1 of the third embodiment)
As shown in FIGS. 8 and 9, the first upper protruding piece 31a1 provided at the tip of the upper end 31a is hooked to the engaging hole 25, and the cover 4 covers the upper end 31a. There may be.
However, as shown in FIG. 10, a first hole 32 is provided in the upper end portion 31a, a protrusion 23 that can be inserted into the first hole 32 is provided in the third inner case 2C, and the upper end portion 31a is provided by the cover 4. May be covered. In this case, the protrusion 23 is a ridge portion of the third inner case 2C and is provided in a region facing the first hole 32.

In this case, a second hole 411 into which the protrusion 23 is inserted may be provided in the region of the cover 4 facing the protrusion 23.

The protrusion 23 of the third inner case 2C is inserted into the first hole 32 of the upper end 31a of the third capacitance loading element 3C, and the second lower protruding piece 31b2 of the lower end 31b is a pilot hole from the z direction. The third capacitive loading element 3C is attached to a recessed region on the outer surface of the third inner case 2C so as to be inserted into the portion 21b. As a result, the third capacitance loading element 3C is temporarily fixed to the outer surface of the third inner case 2C.
After temporary fixing, screws are inserted into the through holes 311 and the first screw holes 211, and the third capacitance loading element 3C is fixed to the third inner case 2C by screwing.
Further, the protrusion 23 of the third inner case 2C is inserted into the second hole 411 of the cover 4, and then screws are inserted into the third screw hole 412 and the second screw hole 212, and the cover 4 is screwed to the third. It is attached to the inner case 2C.

Also in this case, since the upper end portion 31a is covered by the cover 4, the same effect as that of the third embodiment can be obtained.

(Modification 2 of the third embodiment)
As shown in FIGS. 8 and 9, the cover 4 may be attached to the third inner case 2C by screwing.
However, as shown in FIG. 11, the cover 4 may be attached to the third inner case 2C by snap fastening.
In this case, the cover 4 is provided with an engaging claw 41 projecting downward in the z direction instead of the third screw hole 412.
Further, the ridge portion of the third inner case 2C is provided with a claw insertion hole 27 into which the engaging claw 41 is inserted instead of the second screw hole 212 in the region facing the engaging claw 41.

The first upper protruding piece 31a1 of the upper end 31a of the third capacitive loading element 3C is inserted into the engaging hole 25 from the z direction, and the second lower protruding piece 31b2 of the lower end 31b is a pilot hole from the z direction. The third capacitive loading element 3C is attached to a recessed region on the outer surface of the third inner case 2C so as to be inserted into the portion 21b. As a result, the third capacitance loading element 3C is temporarily fixed to the outer surface of the third inner case 2C.
After temporary fixing, screws are inserted into the through holes 311 and the first screw holes 211, and the third capacitance loading element 3C is fixed to the third inner case 2C by screwing.
Further, the engaging claw 41 is inserted into the claw insertion hole 27, and the cover 4 is attached to the third inner case 2C by snap fastening.

Also in this case, since the upper end portion 31a is covered by the cover 4, the same effect as that of the third embodiment can be obtained.
Further, it is not necessary to fix the cover 4 from above in the z direction by screwing.
Therefore, the number of screws used can be reduced as compared with the form in which the cover 4 is fixed to the third inner case 2C by screwing.

Deformation Example 1 (adhesion), Deformation Example 2 (welding), Deformation Example 3 (covering with a film), Deformation Example 4 (pasting with tape), Deformation Example 5 (in-molding) of the first embodiment Molding) can also be applied to the third embodiment.

(Fourth Embodiment)
In the first embodiment, the upper end portion 31a of the first capacitive loading element 3A is inserted into the upper hole portion 21a of the first inner case 2A, whereby the upper end portion 31a of the first capacitive loading element 3A is inserted. The form that makes it difficult to touch from the outside was explained.
However, the form that makes it difficult for the upper end portion 31a to be touched from the outside is not limited to this.

For example, as shown in FIGS. 12A, 12B, 13A, and 13B, a part of the upper end 31a of the fourth capacitive loading element 3D further projects toward the outer surface of the fourth inner case 2D. It is conceivable that the upper protruding piece 31a2 is provided and the second upper protruding piece 31a2 is fixed to the fourth inner case 2D by caulking.

The fourth inner case 2D is an example of an inner case, and the fourth capacitive loading element 3D is an example of a capacitive loading element.

Specifically, the upper end 31a of the fourth capacitive loading element 3D in the fourth embodiment is bent toward the outer surface of the fourth inner case 2D and can be inserted into the upper hole 21a.
The upper end portion 31a is provided with a second upper protruding piece 31a2 that projects toward the outer surface of the fourth inner case 2D.
The lower end 31b of the fourth capacitive loading element 3D is provided with a second lower protruding piece 31b2 that projects downward in the z direction.

In the region where the upper end portion 31a of the fourth inner case 2D according to the fourth embodiment is inserted, an upper hole portion 21a recessed inward of the fourth inner case 2D is provided.
In the ridge portion of the fourth inner case 2D, a recessed portion 28 that communicates with the upper hole portion 21a and is recessed downward in the z direction is provided in a region facing the second upper protruding piece 31a2.
In the region of the fourth inner case 2D into which the second lower protruding piece 31b2 of the lower end portion 31b is inserted, a pilot hole portion 21b recessed downward in the z direction with respect to the other regions is provided.
A first screw hole 211 for screwing is provided in a region of the outer surface of the first inner case 2A that faces the through hole 311 of the first capacitive loading element 3A.

The upper end portion 31a is inserted into the upper hole portion 21a, and the second lower protruding piece 31b2 of the lower end portion 31b is inserted into the prepared hole portion 21b from the z direction, so that the first capacitance loading element 3A becomes the first. 1 Temporarily fixed to the outer surface of the inner case 2A.
After temporary fixing, screws are inserted into the through holes 311 and the first screw holes 211, and the fourth capacitance loading element 3D is fixed to the fourth inner case 2D by screwing.
Further, in the pre-screw stage or the post-screw stage, a force is applied to the second upper protruding piece 31a2 from above in the z direction, and the second upper protruding piece 31a2 is bent downward in the z direction. That is, caulking is performed.

Since the upper end portion 31a is inserted into the upper hole portion 21a, the end surface of the upper end portion 31a of the fourth capacitive loading element 3D is hidden in the upper hole portion 21a.
Therefore, after the fourth capacitive loading element 3D is fixed to the fourth inner case 2D, the end face of the upper end portion 31a is less likely to be touched from the outside. Thereby, for example, it is possible to prevent the operator from touching the end face and deforming the fourth capacitance loading element 3D during the assembly work of the in-vehicle antenna device 1.

Further, since the upper end portion 31a of the fourth capacitance loading element 3D is inserted into the upper hole portion 21a of the side portion of the fourth inner case 2D, the upper end portion 31a of the fourth capacitance loading element 3D is inserted in the z direction. There is no need to fix it with screws from above.
Therefore, the number of screws used can be reduced as compared with the form in which the upper end 31a of the fourth capacitive loading element 3D is fixed to the first inner case 2A by screwing.

If the number of screws used can be reduced, the cost can be reduced. Further, as a result of reducing the number of screws to be used, it is possible to reduce the influence on the electrical performance of the fourth capacitive loading element 3D when the screws come into contact with the fourth capacitive loading element 3D.

Further, since the fixing is performed by caulking, the fourth capacitance loading element 3D can be more firmly fixed to the fourth inner case 2D as compared with the form in which the caulking is not performed.

(Fifth Embodiment)
In the first embodiment, a mode in which the first capacitive loading element 3A is composed of a conductor plate has been described.
However, the configuration of the capacitive loading element is not limited to this.
For example, the capacitive loading element is printed on a film-like member, and it is conceivable that the capacitive loading element is attached to the inner case by attaching the film-like member to the inner case.
In the case of such a form, the capacitive loading element is printed on the surface of the film-like member on the side facing the outer surface of the inner case. That is, on the film-like member, the capacitive loading element is printed on the surface on the side to be attached to the inner case.

Since the capacitive loading element is provided between the film-like member and the inner case, the end faces of the edges of the capacitive loading element (upper end, lower end, front end, rear end) are It becomes difficult to touch from the outside. Thereby, for example, it is possible to prevent the operator from touching the end face and deforming the capacitive loading element during the assembly work of the in-vehicle antenna device 1.

(Modification 1 of the fifth embodiment)
Further, instead of printing the capacitive loading element on the film-like member, a metal material constituting the capacitive loading element is attached to the outer surface of the inner case by vapor deposition or printing, and the area where the attachment is performed is in the form of a film. It may be covered with a member.

Even in this case, since the capacitive loading element is provided between the film-like member and the inner case, the edges of the capacitive loading element (upper end, lower end, front end, rear end). The end face of the is less likely to be touched from the outside. Thereby, for example, it is possible to prevent the operator from touching the end face and deforming the capacitive loading element during the assembly work of the in-vehicle antenna device 1.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, as well as in the scope of the invention described in the claims and the equivalent scope thereof.

1 In-vehicle antenna device 2A 1st inner case 2B 2nd inner case 2C 3rd inner case 2D 4th inner case 21a Upper hole 21b Pilot hole 211 1st screw hole 212 2nd screw hole 22 Wall 23 Projection 24 Prevention hole 25 Engagement hole 27 Claw insertion hole 28 Recessed part 3A 1st capacitance loading element 3B 2nd capacitance loading element 3C 3rd capacitance loading element 3D 4th capacitance loading element 31a Upper end of capacitance loading element 31a1 1st upper Protruding piece 31a2 Second upper protruding piece 31b Lower end of capacitive loading element 31b1 First lower protruding piece 31b2 Second lower protruding piece 311 Through hole 32 First hole 33 Protruding part 34 Pull-out prevention piece 34a Upper end 31a The tip (root part) on the side near the end face of
34b Tip on the side away from the end face of the upper end 31a 4 Cover 41 Engagement claw 411 2nd hole 412 3rd screw hole 5a 1st antenna element 5b 2nd antenna element 6a 1st board 6b 2nd board 7 Pad 8 Metal base 9 Seal member

Claims (7)

Inner case and
The capacitive loading element held on the outer surface of the inner case and
With
An in-vehicle antenna device in which an end portion of the capacitive loading element is held inward with respect to an outer surface of the inner case while the capacitive loading element is held in the inner case. The inner case has a hole recessed inward and has a hole.
The vehicle-mounted antenna device according to claim 1, wherein the end portion of the capacitive loading element is bent inward and inserted into the hole portion to be held inward with respect to the outer surface of the inner case. The inner case has a wall portion protruding outward and a protrusion.
A hole is provided at the end of the capacitive loading element, and the end is held inside the outer surface of the inner case by inserting the protrusion into the hole in a region surrounded by the wall. The vehicle-mounted antenna device according to claim 1. The capacitive loading element has a protrusion that protrudes in the front-rear direction.
The vehicle-mounted antenna device according to claim 3, wherein when the capacitive loading element is attached to the inner case, the protrusion is deformed and held by the wall portion. The end of the capacitive loading element includes a lower end and an upper end.
The inner case according to any one of claims 1 to 4, wherein the inner case does not cover the lower end of the capacitive loading element but covers at least a part of the upper end of the capacitive loading element. In-vehicle antenna device. Inner case and
The capacitive loading element held on the outer surface of the inner case and
A cover that covers a part of the area of the capacitive loading element held by the inner case from above,
With
The cover is an in-vehicle antenna device that covers the upper end of the capacitive loading element from above. The end of the capacitive loading element includes a lower end and an upper end.
The vehicle-mounted antenna device according to claim 6, wherein the cover does not cover the lower end portion of the capacitive loading element but covers at least a part of the upper end portion of the capacitive loading element.

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